
    //加 
export let floatAdd = (arg1,arg2)=>{ 
    var r1,r2,m; 
    try{r1=arg1.toString().split(".")[1].length}catch(e){r1=0} 
    try{r2=arg2.toString().split(".")[1].length}catch(e){r2=0} 
    m=Math.pow(10,Math.max(r1,r2)); 
    return (arg1*m+arg2*m)/m; 
} 
     
  //减 
export let floatSub=(arg1,arg2)=>{ 
   var r1,r2,m,n; 
   try{r1=arg1.toString().split(".")[1].length}catch(e){r1=0} 
   try{r2=arg2.toString().split(".")[1].length}catch(e){r2=0} 
   m=Math.pow(10,Math.max(r1,r2)); 
   //动态控制精度长度 
   n=(r1>=r2)?r1:r2; 
   return ((arg1*m-arg2*m)/m).toFixed(n); 
} 
     
  //乘 
export let floatMul=(arg1,arg2)=>{ 
   var m=0,s1=arg1.toString(),s2=arg2.toString(); 
   try{m+=s1.split(".")[1].length}catch(e){} 
   try{m+=s2.split(".")[1].length}catch(e){} 
   return Number(s1.replace(".",""))*Number(s2.replace(".",""))/Math.pow(10,m); 
} 
     
     
  //除 
export let floatDiv=(arg1,arg2)=>{ 
    var t1=0,t2=0,r1,r2; 
    try{t1=arg1.toString().split(".")[1].length}catch(e){} 
    try{t2=arg2.toString().split(".")[1].length}catch(e){} 
      
    r1=Number(arg1.toString().replace(".","")); 
    
    r2=Number(arg2.toString().replace(".","")); 
    return (r1/r2)*Math.pow(10,t2-t1); 
}